pci_traverse_device_nodes
void *pci_traverse_device_nodes(struct device_node *start,
EXPORT_SYMBOL_GPL(pci_traverse_device_nodes);
pci_traverse_device_nodes(dn, add_pdn, phb);
pci_traverse_device_nodes(pe_dn, count_non_bridge_devices, &counts);
pci_traverse_device_nodes(pe_dn, count_spare_msis, &counts);
pci_traverse_device_nodes(slot->dn, pnv_php_add_one_pdn, hose);